US2114033A - Lock parts and method of forming them - Google Patents

Description

April l2, 1938. 1 A. 1 scHuYLER LOCK PARTSVAND METHOD OF` FORMING THEM Filed June 14, 1935 2 sheets-sheet 2y 4/ 6 254/ 54/ 2Q 254,24 Z22 3 2)2 23 2 23 24' Z4 s 'L L5 f VvE/'wolf1 A. L Schw/ER r' @R31 w AraR/vfr 1 v lPatented Apr. `12, Y

PATENT OFFICE f "LOCK raars -METHOD oFfroRmNG "Andrew L. Schuyler, La Grange, lll., assignor to Westem` ,ElectricV fCompany,` Incorporated, New I Y York, N. Y., a'corporation oLNewxYork yApplicationJam? 14, 1935, serial No. .26,599

,solaimsq(Craze-14st v non equipment, centempiatesja loci; boitier .a rotor center4 tumbler type lock.forn'iefi` fromsheet 3 `rifietalstocl: by blanlring, perforating andvbending lthej lower half of.thebolty and'attaching a hat 'plate thereto at the latch` portion, thenreducing @14" the thickness oftheiatch portion of the bon by swaging it `tothe proper thickness and riveting afsubstantially U-sh'apedupper half of a lock y bolt, which hasbe'en formed by aserles of punch,-y

` n" ajpn'ch press, to theiwer hair or the lock` boit` assembly. I ,In accordance with another embodiment, the upperhalf fof a lock `bolt assembly is formedv .byv

2B of "tlat metal stock, simultaneously shearing Vvand bending a portion ofthe' blank,n forming a second bend inthe blankandattaching the part just def;

scribed to la blank of e. predetermined `shape by ".to "a predetermined.dimension vin .thicknessand shaving thefedgespf thev joined-parts toa predeterminedcontour.v y, l l f 1.-.*-

"O'ther featuresand advantages'of `the inven-k wtion will become apparent fromgthe following deltailed description when considered in conjunction with they accompanying drawings, wherein Figs.` 1 to 4 are plan-views of the lowerportion of the lock boltassembly'in "the various I stages of its manufacture;- f

and 3;" l n 4 Figs.` '1, 8, 9 and 10 are afplanview, 'a sidevew';

a plan view and an .end elevationaly view, re-

ture; A .I

"150 `lower half, offthe lock bolty assemblyV after they they are assembled;

f Fig. 13 is an en yinFig. 12; f

' shown in'Figs". 14 to 17, inclusive, is used;

i ing, 'shaving,.be`nding andslotting operations ,onty

perforating and ustampilng'a blank; from a s heet n welding it theretofthenjswagwing the joined parts Figs.y5 and 6 are endviews of the upper half ,of` the lock bolt assemblyas shown in` Figs'. `2

spenvely, .of the uppehalf .of the Jock fbolu' assembly inthe various -stages of its manufac- Figs. 11 and 12 are plan viewsof the upper and:

have been assembledillustrating/the two stagesv of! manufacture'` through "which" they` pass" after d veyypf the structure shown fother type of upper half of a. lock bolt assembly;

I Fig. A18 is a plan view of the lower half of a lock bolt assembly with which the upper half y Figs'.` 19, 20 and 21` are planviews of the as- 6 `sembled` upper and lower parts of the lo'ck `bolt assembly during the varioussteps in its manufacture, and

Fig'. 22`is a plan View. of a lock with the cover 10 K plate'removedand illustrating the 4type of p ylock v `bolt assembly. shown in Figs. 19 to 21, in posi- `tion in a lock. I

In the embodiment of the invention disclosed in Figs.` l tof13, a lock bolt `assembly is .formed 15 by stamping 'ablank` I (Fig. 1) `from a strip of sheet metal stock wherein the blank I has a slot Zand apertures-,3 and! formed therein in the stamping operation. L A projecting portion` is also formed fas apart of the blank Iin this` stamping operation. y; 20

The blank I is then subjected to anotherpunchf" ingoperation in which, operation the projecting; portion y5 is'`b e`nt"upwardlywas shown in-Fig. 2- toprovide a strengthening rib when the bolt is f assembledina lock. p l *I 25 In the' next succeeding operation, a fiat metal stript' is secured to the lower or forward end.

of the blank llbyfw'eldingit at points 1 as shown..

on the` bolt of a.,v predetermined thickness.

`After the strip` I` is secured to ytheblank I l as shownlinFig. 3the lower or forwardy end of the bolt is subjected yltyrnfessure to-swage-thatv portion thereof to the desired thickness.` `This Willresult irrforcing somey of thev metal lof` lthe blank I and the strip I out of its former shape. as indicated by the rough edges at 8 (Fig. 4). The assembled'strip 6 and blank I are then ready'to` be assembledwith the upperhalf of the bolt 540 assembly. 1 n

,Theupperhalf of the bolt asrsemblyisi'ormed` by stamping a blank 9 havingthe contour shown in f7 `from sheetmetal stock. This blank 9 is thenstood on edge and shaved to form abev-45 elededgeat I0 and a V-shaped groove at Il (Fig. 8). f After having the beveled edge and V-shapedgroove formed in the blank 9, theblank isagain laid fiat land slottedin a punch :pressr as shown atv I2 (Fig. 9`) After this slottingoper-'- 50 ati-on, the blank Il is subjected to anotherpunch press operation Awhich forms it to a substantially Ur-shapedcontour as` shown in Fig. 10 wherein` the. sides are formed. ,These sides willin the" `finished lock shown in Fig. 22,coopera.te with in Fig. 16 along the line 2|.

the code notches M formed in operation of the lock.

It.will be noted that the tumblers upon in Figs. 7, 9 and 10 the blank l has a pair of upwardly extending lugs I3. These lugs are insertd in the apertures 3 and 4 in the blank I and serve as rivets to hold the formed blank 2 which constitutes the upper half of the bolt .assembly in place on the lower half of the bolt assembly.

After the parts are in Fig. 11, thefedges of the latching portionv of the bolt which ismade up of strip 8 and forward or lower end ofthe blank I are shaved at I5 to the desired contour, thereby removing the rough edges shown at l (Fiss. 4'and 11). The final bolt assembly comprising the upper half formed from the blank l and the lower half formed from the blank I and strip 8 will then be as shown in Figs. 12 and,13. In this condition the bolt assembly is Fig. 22 in a lock of the same general type but not the exact construction of the lock shown in the patent to O. A. Shann, 1,793,254, patenteddFebruary 17, 1931.

In another embodiment of the invention a similar type of lock bolt assembly is provided. 'I'his latter type of lock bolt is formed in a manner similar to that described hereinbeforeV except that being somewhat simpler in construction there are fewer operations required in the manufacture of it. Figs. 14 to 21 illustrate the steps in the manufacture of this type of lock bolt..

In accordance with this embodiment of the invention, a blank of the latching portion and lug of the bolt. After the blankZIl has been stamped from stock it is sheared along the line 22 and bent along the line 2l as shown in Fig. 15 After the blank has been stamped as shown in Fig. 14 and bent as shown in Fig. 15, it is again subjected to a bending operation to bend a portion of it forwardly as shown After the bending operations have b'een performed, the blank is set flat in a xture and shaved to form a V-shaped' 17) in the portion. lthereof which was bent downwardly at 23 as groove as shown at 25 (Fig.

shown in Fig. 20 and then twisted forwardly by bending along the line A24 as shown in Fig. 16. The blank 2l which has been formed to the shape shown in Fig. 17, constitutes the upper .half of this type of lock bolt assembly and also provides the barrel 32 `as shown in a thickening or filler tion of the bolt.

j -The lower portion stamping a blank 28 the contour shown in Fig. 18, wherein there is a guide slot 40 and a rounded cut out portion I1 .for cooperation with an actuating lever on of a lock (Fig. 22). The blank 20, Fig. 17, is secured to the blank 28 by spot welding it thereto at the-points 21 whereupongthe assembled upper and lower halves of the assembly arev subjected to pressure at the latching portion. This operation will reduce the of the bolt is formed by kthickness of the latching portion by swaging the surplus rmetal downwardly and to the sides as shown in Fig. 20 to reduce the thickness of the Y latching portion to the desired dimension (see 111g. 20). After the upper and lower halves of the` assembly have been joined together as dethus assembled as shown` which thelOck bolt ready to be assembled as shown iny punching a'blank from sheet plate for the latching por from sheet metal stock to' wherein the lock bolt, l assembly designated gen-l erallyin Fig. 22 by the-numeral 3| is assembled with a lock center or barrel 32. movable tumblers I3, and fixed tumbler 34 in a housing Il. The lock shown in Fig. 2 2 with the top plate removed is a known type. of rotor center tumbler type lock as shown by Patent No. 1,793,254 in assembly II acts in the-same manner as heretofore and is of the same general contour as those heretofore used, the distinction being that the bolt is formed entirely by punch press operations from sheet metal stock and is therefore much cheaper to manufacture than those heretofore known.

What is claimed is:` l Y 1. Ina lock, a'bolt assembly comprising a latch portion formed of two sheet metal strips welded together and swaged to the desired thickness, a base portion comprising a prolongation of one of said sheet metal strips formed to Aslide in the lock and to cooperate with an actuating lever in the lock, and an upper portion formed of a single piece of sheet metal bent to form a' lug or stud for cooperation with the tumblers of the lock. 2. A method of forming bolts for rotor center tumbler type locks Vwhich includes punching a blank from sheet metal stock to va predetermined configuration to form 'a part of a latch portion, a lever cooperating portion and a guide portion, punchinga blank from sheetmetal stock for use as an upper bolt portion, bending the, second mentioned blank to a shape so that apportion thereof will cooperate with codenotches'in the tumblers of a lock, and' securing it to said ilrst blank.

3. A method of forming boltsfor rotor center tumbler type locks which includes punching a blank from sheet metal stock to a predetermined configuration to form a part of a latch' portion, a lever cooperatingportion anda guidetportion, ,metal 101 Se as an upper bolt portion, bending'the second me`n`` honed blank to a `shape so that a portion thereof' will cooperate with code notches in the tumblers of a lock, shaving'- a V-shaped safetynot'ch in a portion of said bent blank, welding a thickening plate to the first formed-blank, swaging the joined first mentioned blank andthickening plate to the ldesired thicknessto fornra latch portion, and

shaving the latch portion to the desired contour. 4. A method of forming-bolts for rotor center tumbler type locks-which includes punching a punching a blank from sheet metal stock for use as an upper boltportion, bending the second mentioned blank to a shape .so that a portion' thereof will cooperate with code notches inthe tumblers of a lock, shaving a V-shaped safetyl notch in a portion of said bent blank, welding a thickening plate which may constitute part of the bent blank to the ilrst formed blank, swaging the Joined first mentioned blank and thickening plate to the desired thickness toV form a latch portion, and shaving the latch portion to the desired contour.

5. In a lock, a bolt assembly comprising a latch portion formed of two sheet metal strips welded together and swaged to the desired thickness. a `base portion comprising a prolongation of one of said sheet metal strips formed to slider in the iockand to cooperate withan actuating lever in the lock, and an upper portion formed of a single piece of sheet metal bent to form a lug or stud 1i for cooperation with the tumblers and having a i V-shaped groove ,shaved therein'or cooperation "with corresponding safety grooves in the tumblers of the lock.

Y *6. In a lock, a. bolt comprising a base plate ',formed from a single sheet of metal and `having a guide slot formed therein, aportion adapted to cooperate with the actuating lever of the lock and an extending portion to provide a part of the ,A latching portion of the lock, a thickening plate 'attached to the base at the latching portion thereof, said thickening plate and base being swaged to the desired thickness and shaved to the desired contour, an upper portion adapted to cooperate with the tumblers of thelock comprising a sheet metal blank punched to a predetermined contour n and having its edges shaved to form a bevel on 1 tumblers of the lock and beingvxed to the base plate by riveting.

tumbler type locks comprising" punching a blank from sheet metal and concurrently perforatlng `an aperture therein, shearing and bending a .portion of the blank down to the aperture yto one edge and a V-'shaped groove inthe othery edge,` the upper portion being bent to cooperate with the safety notches and code lnotches on the y 7. lA method of formingtboltsffor rotor center g bend a portion of the blank at right angles to the remainder of the blank, forming a right angle bend in the blank at right angles to the bend previously formed therein, shaving a v -shaped notch in one of the bent portions, punchingy aV base from sheet metal stock, Welding a portion of the rst mentioned blank to thebase, swagng the base and first mentioned blank where they are joined together by welding to a predetermined thickness, and shaving. the welded together base and blank to the desired contour for use as the latching portion of a lock bolt.

8. A method of forming bolts for vrotor center l tumbler type locks comprising punching an apertured and slotted lblank from sheet ymetal stock, bending a projecting portion of the blank at right angles to the remainder thereof to form a strengthening rib, welding a flat sheet metal plate i to a projecting portion of the blank, swaging the welded together portions of the blank and the `plate to a predetermined thickness, forming an upper portion of the bolt by punching an irregularly shaped blank from sheet metal stock, standing the irregularly shaped blank on edge, and

' shaving a bevel on one edge thereof and a V- shaped groove on the other edge thereof, punch-y ing a notch in the blankthus formed, bending the blank to a substantiallyU-shaped conguration,v inserting two portions of the irregularly shaped blank which is now of U-shaped conguration in the apertures formed in the base, riveting the U-shaped member to the base, and shaving the latching portion to they desired contour.

- ANDREW L. SCHUYLER.

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